North Korean leader's son apparently promoted to general

He and King Jong Il's sister appeared to be on a list of military promotions

It could be the first public mention of Kim Jong Un by the North Korean media

(CNN) -- North Korean leader Kim Jong Il's youngest son apparently was among more than 30 military promotions announced Monday by his father during celebrations of the Workers' Party of Korea's 65th anniversary, North Korea's state news agency reported.

Kim Jong Un has been widely rumored to be his ailing father's anointed successor.

Kim Jong Il's sister, Kim Kyong Hui, was apparently also promoted to general, according to the state-run KCNA news agency.

While it has been speculated that Kim Jong Un will succeed his father, details about him are scarce in North Korea and out.